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41. [AMPS] RJ-iA relay contact-life on CW? (score: 1): Author: measures@vc.net (Rich Measures); Date: Sun, 4 Jul 1999 08:38:09 -0700; ? My guess is hotswitching did the damage instead of 2-million closures. . As I recall, the 78 does not use enough potential to enable the RJ-1A to close fast enough to beat modern transceivers. To; /archives//html/Amps/1999-07/msg00036.html (8,607 bytes)
42. [AMPS] PS diode equalizing (score: 1): Author: measures@vc.net (Rich Measures); Date: Sun, 4 Jul 1999 11:00:18 -0700; ? I contend that the statement "In fact, shunt resistors can actually create problems..." has nothing to do with resistor problems. I have seen situations where "equalizer resistors" caused potential; /archives//html/Amps/1999-07/msg00043.html (10,688 bytes)
43. [AMPS] RJ-1 relay (score: 1): Author: measures@vc.net (Rich Measures); Date: Sun, 4 Jul 1999 11:00:21 -0700; ? With 26v appled to the coil, I measure around 7mS. The Kilovac HC-1 is around 6mS. With a 120v current-limited source, either relay will switch in about 1.8mS. ? I turn down the RF Gain on the RX; /archives//html/Amps/1999-07/msg00044.html (8,054 bytes)
44. [AMPS] RJ-1 relay (score: 1): Author: measures@vc.net (Rich Measures); Date: Sun, 4 Jul 1999 13:07:19 -0700; greetings, Dan -- ? Not if you have a modern transceiver -- which typically switch in 5mS to 8mS. If that be the case, you also need a speedup circuit and more volts to make the grade. ? which is not; /archives//html/Amps/1999-07/msg00046.html (8,236 bytes)
45. [AMPS] RJ-1 relay (score: 1): Author: measures@vc.net (Rich Measures); Date: Sun, 4 Jul 1999 13:24:08 -0700; ? the bypass swr problem can be corrected with very roughly 30pF of shunt C. ? The RJ-1A is spdt. I know of no suitable dpdt relays that are fast enough. The input end can be handled by a Matsushita; /archives//html/Amps/1999-07/msg00047.html (9,148 bytes)
46. [AMPS] Re: Need info on mica caps (score: 1): Author: measures@vc.net (Rich Measures); Date: Sun, 4 Jul 1999 13:24:12 -0700; ? As I understand it, the current handling ability of mica caps decreases above 3MHz. - cheers, Roy Rich... R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures -- FAQ on WWW: http://www.conte; /archives//html/Amps/1999-07/msg00048.html (7,638 bytes)
47. [AMPS]n4kw@citrus.infi.net RJ-iA relay contact-life on CW? (score: 1): Author: measures@vc.net (Rich Measures); Date: Mon, 5 Jul 1999 08:42:12 -0700; ? My measurements indicated a shorter period of contact bounce for both relays. . With a 110v.oc current-limited source, neither relay fully closed in under 1.7mS. ? Do you mean 2mS for initial make; /archives//html/Amps/1999-07/msg00057.html (16,540 bytes)
48. [AMPS] PS diode equalizing (score: 1): Author: measures@vc.net (Rich Measures); Date: Mon, 5 Jul 1999 10:19:19 -0700; values, ? Manufacturers of encapsulated multi-diode stacks used to use equalizer resistors and capacitors. They apparently stopped the practice over 15 years ago. - later, Vic Rich... R. L. Measures; /archives//html/Amps/1999-07/msg00062.html (9,574 bytes)
49. [AMPS]n4kw@citrus.infi.net RJ-iA relay contact-life on CW? (score: 1): Author: measures@vc.net (Rich Measures); Date: Mon, 5 Jul 1999 10:42:54 -0700; ? does the amplifier control signal pass through a relay in the 990? -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps@contesting.com Administrative requests: amps-REQUEST@conte; /archives//html/Amps/1999-07/msg00065.html (10,596 bytes)
50. [AMPS] Re: PS diode equalizing (score: 1): Author: measures@vc.net (Rich Measures); Date: Mon, 5 Jul 1999 19:32:20 -0700; ? In days of yore, folks commonly used 1w-rated resistors for equalizing 1000piv diodes. The max. rated potential for a 1w resistor is typically 350v. - cheers, Peter Rich... R. L. Measures, 805-386; /archives//html/Amps/1999-07/msg00078.html (8,830 bytes)
51. [AMPS]n4kw@citrus.infi.net RJ-iA relay contact-life on CW? (score: 1): Author: measures@vc.net (Rich Measures); Date: Mon, 5 Jul 1999 20:46:11 -0700; ? ... not a good bet. A 50A relay can hotswitch for years without failure. Hotswitching is not considered to be good engineering practice, Dan. . Rich... R. L. Measures, 805-386-3734, AG6K, www.vcne; /archives//html/Amps/1999-07/msg00081.html (9,166 bytes)
52. [AMPS]n4kw@citrus.infi.net RJ-iA relay contact-life on CW? (score: 1): Author: measures@vc.net (Rich Measures); Date: Mon, 5 Jul 1999 20:46:15 -0700; ? ? Warning: This document has erronius attribution marks. ? agreed ? Why cater to lock-to-talk miscreants? Lock-to-talk is unnecessary. With SSB VOX, amp tubes cut off in a fraction of a second dur; /archives//html/Amps/1999-07/msg00082.html (12,391 bytes)
53. [AMPS] PTT and LTT (score: 1): Author: measures@vc.net (Rich Measures); Date: Tue, 6 Jul 1999 02:07:18 -0700; ? With a quiet, high-speed switching amplifier and a modern transceiver, VOX is almost like talking on the telephone -- especially when one wears headphones. ? For me, the worst is those who would m; /archives//html/Amps/1999-07/msg00086.html (7,498 bytes)
54. [AMPS] Re: PS diode equalizing (score: 1): Author: measures@vc.net (Rich Measures); Date: Tue, 6 Jul 1999 02:07:21 -0700; Peter: ? agreed However, without equalization resistors, there is equal reverse current in each diode -- provided that the diodes are similar. Rich... R. L. Measures, 805-386-3734, AG6K, www.vcnet.c; /archives//html/Amps/1999-07/msg00087.html (9,188 bytes)
55. [AMPS] Re: PS diode equalizing (score: 1): Author: measures@vc.net (Rich Measures); Date: Tue, 6 Jul 1999 04:12:36 -0700; ? at 35 or so kHz, this could be important. ? So use a 50% safety factor. 1N5408s are not expensive. ? I agree. Rich... R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures -- FAQ on WWW: http; /archives//html/Amps/1999-07/msg00090.html (9,478 bytes)
56. [AMPS] Re: PS diode equalizing (score: 1): Author: measures@vc.net (Rich Measures); Date: Tue, 6 Jul 1999 08:45:35 -0700; The smell of ozone would tell you when they were on. - cheers, Peter Rich... R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissio; /archives//html/Amps/1999-07/msg00098.html (9,313 bytes)
57. [AMPS] professional rectifiers/equalisers (score: 1): Author: measures@vc.net (Rich Measures); Date: Tue, 6 Jul 1999 08:45:37 -0700; To do it right, one needs to sort diodes according to PIV and C, so that similar diodes can be used in each series string. This takes about 30 seconds per diode, so the additional labor cost has to; /archives//html/Amps/1999-07/msg00099.html (8,050 bytes)
58. [AMPS]n4kw@citrus.infi.net RJ-iA relay contact-life on CW? (score: 1): Author: measures@vc.net (Rich Measures); Date: Tue, 6 Jul 1999 08:45:33 -0700; ? congrats on picking up on the spelling glitch. (wrong attribution marks) (correct attribution marks) ? Various attribution level marks (>, >>, >>>, >>>>) help readers to identify who said what whe; /archives//html/Amps/1999-07/msg00100.html (10,051 bytes)
59. [AMPS] Re: Need info on mica caps (score: 1): Author: measures@vc.net (Rich Measures); Date: Tue, 6 Jul 1999 09:56:05 -0700; ? got any URLs, Tom? ? I never saw a mica capacitor that wasn't multi-layer. ? Who said that it becomes a poor dielectric at 3MHz? In my collection of mica transmitting caps, current rating is often; /archives//html/Amps/1999-07/msg00109.html (8,550 bytes)
60. [AMPS] info on mica caps (score: 1): Author: measures@vc.net (Rich Measures); Date: Tue, 6 Jul 1999 19:24:48 -0700; thanks for the information, Phil. . Rich... R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps@contesting.com Administr; /archives//html/Amps/1999-07/msg00117.html (11,059 bytes)

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